linux-kernel - [PATCH] mm: page_alloc: use the correct type of list for free pages

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Message-Id: <7e7ab533247d40c0ea0373c18a6a48e5667f9e10.1687333557.git.baolin.wang@linux.alibaba.com>
Date:   Wed, 21 Jun 2023 16:14:28 +0800
From:   Baolin Wang <baolin.wang@...ux.alibaba.com>
To:     akpm@...ux-foundation.org
Cc:     mgorman@...hsingularity.net, baolin.wang@...ux.alibaba.com,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: [PATCH] mm: page_alloc: use the correct type of list for free pages

Commit bf75f200569d ("mm/page_alloc: add page->buddy_list and page->pcp_list")
introduces page->buddy_list and page->pcp_list as a union with page->lru, but
missed to change get_page_from_free_area() to use page->buddy_list to clarify
the correct type of list for a free page.

Signed-off-by: Baolin Wang <baolin.wang@...ux.alibaba.com>
---
 mm/page_alloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 5c691426822a..c1839a53326c 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -727,7 +727,7 @@ static inline struct page *get_page_from_free_area(struct free_area *area,
 					    int migratetype)
 {
 	return list_first_entry_or_null(&area->free_list[migratetype],
-					struct page, lru);
+					struct page, buddy_list);
 }
 
 /*
-- 
2.27.0